表头固定

<style type="text/css"> 
<!-- 
body,table, td, a {font:9pt;} 
/*重点：固定行头样式*/
.scrollRowThead{position: relative; 
left: expression(this.parentElement.parentElement
.parentElement.parentElement.scrollLeft);
z-index:0;}
/*重点：固定表头样式*/
.scrollColThead {position: relative;
top: expression(this.parentElement.parentElement
.parentElement.scrollTop);
z-index:2;}
/*行列交叉的地方*/
.scrollCR { z-index:3;}
/*div外框*/
.scrollDiv {height:200px;clear: both; 
border: 1px solid #EEEEEE;
OVERFLOW: scroll;width: 320px; }
/*行头居中*/
.scrollColThead td,.scrollColThead th
{ text-align: center ;}
/*行头列头背景*/
.scrollRowThead,.scrollColThead td,.scrollColThead th
{background-color:EEEEEE;}
/*表格的线*/
.scrolltable{
border-bottom:1px solid #CCCCCC; 
border-right:1px solid #CCCCCC; }
/*单元格的线等*/
.scrolltable td,.scrollTable th{
border-left: 1px solid #CCCCCC; 
border-top: 1px solid #CCCCCC; 
padding: 5px; }
--> 
</style>
<h1>利用CSS代码让Table产生固定表头</h1>
<h3>www.865171.cn</h3>
<div id="scrollDiv" class="scrollDiv" >
<table border="0" cellpadding="3" cellspacing="0" width="300" class="scrollTable">
<tr class="scrollColThead"  >
  <th class="scrollRowThead scrollCR"  >&nbsp;</th>
  <th colspan="2">列头</th>
  <th colspan="2">列头</th>
</tr>
<tr class="scrollColThead"  >
  <th class="scrollRowThead scrollCR"  >h1</th>
  <th >h2</th>
  <th >h3</th>
  <th >h4</th>
  <th >h5</th>
</tr>
<tr>
  <td class="scrollRowThead"  >
	<input type="checkbox" name="checkbox" value="checkbox">
	a</td>
  <td>单元格2</td>
  <td>单元格3</td>
  <td>单元格4</td>
  <td>单元格5</td>
</tr>
<tr>
  <td class="scrollRowThead"  >
	<input type="checkbox" name="checkbox2" value="checkbox">
	b</td>
  <td>单元格2</td>
  <td>单元格3</td>
  <td>单元格4</td>
  <td>单元格5</td>
</tr>
<tr>
  <td nowrap class="scrollRowThead"  >
	<input type="checkbox" name="checkbox3" value="checkbox">
	c</td>
  <td nowrap>单元格2</td>
  <td nowrap>单元格3</td>
  <td nowrap>单元格4</td>
  <td nowrap>单元格5</td>
</tr>
<tr>
  <td class="scrollRowThead"  >
	<input type="checkbox" name="checkbox4" value="checkbox">
	d</td>
  <td>单元格2</td>
  <td>单元格3</td>
  <td>单元格4</td>
  <td>单元格5</td>
</tr>
<tr>
  <td class="scrollRowThead"  >
	<input type="checkbox" name="checkbox5" value="checkbox">
	e</td>
  <td>单元格2</td>
  <td>单元格3</td>
  <td>单元格4</td>
  <td>单元格5</td>
</tr>
<tr>
  <td class="scrollRowThead"  >
	<input type="checkbox" name="checkbox6" value="checkbox">
	f</td>
  <td>单元格2</td>
  <td>单元格3</td>
  <td>单元格4</td>
  <td>单元格5</td>
</tr>
<tr>
  <td class="scrollRowThead" >
	<input type="checkbox" name="checkbox7" value="checkbox">
	g</td>
  <td>单元格2</td>
  <td>单元格3</td>
  <td>单元格4</td>
  <td>单元格5</td>
</tr>
</table>
</div>